Robo Car does very good, due to his dual attacks. In addition, it is easy to go from last to first: Knock aside the 3rd and 2nd placers, then kill the 1st player.

Trivia

The idea for Robo Car may have come from Transformers, a movie/TV seires where robots can transform into various objects. It is also one of the two robotic pets in the game, the other one being Robo Spacecraft.

Robo Car for Transformers would most likely look like Bumblebee's vehicle form.